A circular shaped item with an aperture manufactured to predetermined dimensions and designed for use as a seal in stuffing boxes, packing nuts, and the like. It may be (1) any nonmetallic molded or formed ring (except solid (without joint) rings having a square or rectangular cross section); or (2) any shredded metal or metal foil type metallic or semimetallic rings. Excludes felt items but includes multimaterial items in which one of the materials is felt. For solid (without joints) nonmetallic items with a square or rectangular cross section, see washer (as modified) and gasket. For rubber items specifically designed for weather-proofing doors, windows, chests, and the like see seal, nonmetallic angle; seal, nonmetallic channel; and seal, nonmetallic, special shaped section. For circular (with aperature) nonmetallic items with a solid round cross-section see o-ring. Excludes cup, compression; gasket; washer (as modified); and felt, mechanical, preformed.
Classification: Gaskets,washers & other seals
NSN 5999-01-579-3601
NSN 5915-00-819-3653
NSN 4140-01-113-2055
NSN 6130-00-486-0570
NSN 6150-01-486-3037
NSN 5975-01-611-3688
NSN 5990-01-027-8260
NSN 5945-00-091-4266
NSN 5920-00-467-9274
NSN 5915-01-529-0577
NSN 5998-00-167-4981
NSN 6320-00-500-0613